ISD4003-08MSY

Overview

The ISD4003-08MSY is a single-chip voice record and playback device from the ISD4003 ChipCorder series, manufactured by Nuvoton Technology Corporation. It provides an 8-minute recording duration at a sampling frequency of 4 kHz with a filter passband of 1.7 kHz. The component operates on a single 2.7 V to 3.3 V supply and features an SPI interface for microcontroller control. It utilizes high-density multilevel Flash memory for non-volatile storage and includes an internal oscillator, anti-aliasing filter, smoothing filter, and AutoMute feature. The device is housed in a 28-SOIC package.

Feature Summary

• Direct analog storage technology preserves natural voice quality without digitization or compression.
• AutoMute feature attenuates background noise during silence periods to improve audio clarity.
• Fully addressable multiple message handling via SPI or Microwire serial interface.
• Non-volatile Flash memory retains messages for up to 100 years without power.

Applications

• Portable cellular phones and mobile devices requiring voice messaging.
• Microprocessor-based systems needing low-power voice recording capabilities.
• Industrial or commercial equipment utilizing speech prompts and alarms.

Procurement Notes

Verify the specific suffix MSY confirms the 28-SOIC package and industrial temperature range if required. Confirm end-of-life status and availability of recommended substitutes such as I3900FYI. Ensure the design supports the 2.7V to 3.3V supply voltage and SPI timing requirements specified in the datasheet.

Selection Notes

Select this model for applications requiring 8 minutes of voice storage at 4 kHz sampling rate. Choose alternative part numbers within the ISD4003 series for different durations or sampling frequencies. Ensure the system interface matches the SPI protocol and that the operating temperature range meets the environmental requirements of the target application.

Part Context

The ISD4003-08MSY belongs to the ISD4003 ChipCorder series, which offers 4 to 8-minute recording options. This series is designed for portable products and uses patented multilevel Flash memory. The '08' indicates the 8-minute duration variant, while 'MSY' denotes the SOIC package and specific temperature grade.

Replacement Considerations

Nuvoton recommends the I3900FYI as a manufacturer-recommended substitute. Verify pin compatibility and electrical specifications before replacement. Check for any changes in package dimensions or thermal characteristics when transitioning to the alternative part number.

FAQ

How does the AutoMute feature function?

The AutoMute feature minimizes noise during silence by applying 6 dB of attenuation. It uses a peak detector circuit connected to the AM CAP pin to sense signal amplitude and automatically adjusts attenuation based on the presence of audio signals.

What is the maximum input signal level for optimal recording?

For single-ended input mode, the maximum input signal should be 32 mVp-p. In differential-input mode, the maximum input signal at ANA IN+ and ANA IN- should be 16 mVp-p for optimal signal quality.

Can the device operate with an external clock?

Yes, the device can be clocked through the XCLK pin for greater precision. For the 8-minute duration variant (ISD4003-08M), a 512 kHz external clock is recommended to maintain the 4.0 kHz sampling frequency.